Abstract: This invention concerns a sensitive key device with capacitive effect working through an electrically insulating plate, the key being supported by a printed circuit board. According to the invention, the bottom of a single part having a spring blade made of an electrically conducting material is fixed to the printed circuit board. The top (11) of this part forms a detection surface designed to be placed in contact with the transparent plate. The center of the part makes the part flexible such that the detection surface is in elastic contact with the plate, regardless of parallelism defects between this plate and the printed circuit board.

Abstract: The disclosed induction cooking range comprises, in the commonly known way, an upper plate made of glazed ceramic designed to receive a receptacle to be heated made of ferrite material, a monoconductor induction coil positioned beneath the upper plate on a coil support and excited by a high-frequency current generator. The induction coil is allowed to heat by its own losses to a temperature greater than that of the receptacle and the induction coil communicates its own heat to the receptacle. The overall efficiency of the range is thus appreciably increased. The induction coil, which must then tolerate a high temperature, is made out of a flat, monoconductor strip placed between two sheets of mica.

Abstract: A device and method for regulating a cooking apparatus. In order to obtain an effective servocontrol of the desired temperature with a cooking surface, when cooking for example by induction, a servocontrol curve is used in the plane (i.e., temperature, variation of the temperature as a function of time). Each time the curve is crossed the heating power is cut off or reduced. The device and method applies principally to monitoring of the heating device. The device according to the present invention is particularly well adapted to cooking surfaces and especially to cooking surfaces wherein cooking is done by induction.

Abstract: A cook hob (1) possesses a device for the support of controls (10) which are mounted pivotably on a housing (7) equipped with a ventilation circuit. The device comprises a body (12) having a channel (13), one end of which forms the outlet port of the ventilation circuit. The body (12) can pivot between a position in which the controls (10) are accessible and the outlet port is open, and a position in which the controls are not accessible and the outlet port is closed.

Abstract: Apparatus in the form of at least one cooking chamber, e.g. a cooker or an oven for building into a kitchen unit, with the cooking chamber being delimited by a generally rectangular muffle (20) having an open front face. Heater elements (41) are disposed inside the muffle and/or outside the muffle in a contiguous chamber, and a thermally insulating material (50) is moulded over the side walls of the muffle together with the contiguous chamber if present. The thermally insulating material constitutes the core of a frame for the apparatus and forms part of a structure which provides at least a portion of the outside walls of the apparatus. Moulding the insulating material directly over the cooking chamber facilitates manufacture and reduces heat losses through heat-conducting bridges.

Abstract: Apparatus for electrostatically depositing powder on objects which move continuously through a powder-depositing booth of modular type having a powder depositing module (B) on each side of which there is an air filter module (A and C); the powder depositing module (B) has two compartment (B1, B2) next to each other each compartment having a distinct powder store tank (11, 12) which allows two layers of powder to be applied successively to the object to be treated. Application to enamelling objects.

Abstract: A fluidization unit comprising a fluidizer (2) and a chamber (1) for containing a granular, powdery or like substance (3) to be fluidized. The chamber has at least one air-tight wall and the fluidizer comprises an assembly of an air-tight base sheet member (5), a porous sheet member (4), and a peripheral sealing member (6), holding the sheet members apart in a fixed relationship. In operation, said fluidizer is placed in the chamber with its air-tight base member resting against an air-tight wall of the chamber. A preferred application is in the handling of powders for electrostatic enamelling.

Abstract: Apparatus for electrostatically depositing powder on objects which move continuously through a powder-depositing booth of modular type having a powder depositing module (B) on each side of which there is an air filter module (A and C); the powder depositing module (B) has two compartment (B1, B2) next to each other each compartment having a distinct powder store tank (11, 12) which allows two layers of powder to be applied successively to the object to be treated. Application to enamelling objects Figure to be published: FIG. 2.

Abstract: In a heat pump, thermoelements (20,22) are disposed in a thermopile (P1) and are electrically connected in series. Heat is transferred horizontally from the thermopile and vertical air ducts (28) at its sides by suitable arms (42) prolonging heat conductors inside the thermopile. The arms or webs serve to convey heat to heat exchange fins. Application to domestic heating.

Abstract: An installation for electrostatic deposition of powder on objects travelling continuously, by means of a conveyor, through a treatment cage with a side entrance and exit comprises a filtering system, a system for supplying powder and compressed air and a tank for recovery of powder. The cage comprises at least two modules, namely, a first module for storing, projecting and recovering powder, which contains elements for projection of powder onto the objects to be processed, and a second module for filtering and recycling the air in which the air loaded with powder originating from the first module is filtered and recycled to the first module. The cage includes at least one air lock to prevent escape of powder laden air to the exterior of the cage.

Abstract: A pyrolytically cleaned domestic cooking oven including a catalyst for combustion of the smoke evolved during cleaning, and a temperature sensor placed inside the catalyst and arranged to regulate the heating control of the oven during pyrolytic cleaning.

Abstract: The invention relates to a thermoelectric heat exchanger assembly including a liquid flow circuit. In a heat pump some of whose thermoelements (20,22) are disposed in a thermopile (P1), one of the heat exchange fluids is liquid and flows through the successive stages of the thermopile via a continuous metal tube (10) which has electrical resistance and is curved in a U configuration at each stage so as to increase the heat exchange area and to facilitate assembly. Application to domestic heating.

Abstract: A device for applying voltage to a part to be treated by an electrochemical process in which physical contact is established between a current supplying device and the part to be treated only at the moment of treatment, in particular in the case of enamelling by electrophoresis. The device includes an insulating housing (9) for a contact unit, said housing surrounding a connection box (11) connected to electricity supply cables, the insulating housing and the connection box being movable with respect to each other and including contacts (13, 12) which are closed by movement of the insulating housing with respect to the connection box when the contact unit housing is pressed against the part to be treated. The device applies in particular to enamelling by electrophoresis.

Abstract: The method is particularly suitable for applying enamel by electrophoresis inside a hollow body, e.g. a sheet metal part. It consists in using an expandable cathode which, when expanded, approaches the interior angles of the hollow body, thereby favoring deposition of enamel in otherwise unfavored regions of the hollow body. Also, the expandable cathode is hollow and has a fluid flowing through it to drain off unwanted ions which could damage the enamel slip.

Abstract: A pyrolytic self-cleaning oven includes means for heating a thermally insulated oven muffle to a temperature of about 400.degree. to 500.degree. C. to clean the walls thereof by pyrolysis. In order to facilitate the pyrolytic self cleaning action and to reduce the overall time of high heat application to the oven muffle to effect that cleaning, the coldest regions of the muffle, including the inner surface of the access door and narrow zones of the muffle walls immediately surrounding the muffle access opening and the air inlets to the muffle, are provided with a coating of catalytic enamel capable of withstanding the pyrolytic cleaning temperature.